If you hire property management, they will use their lease. They will probably have an attorney that does evictions. So drop the attorney from your list. They will also provide you with income and expense statements. If you have an accountant do your taxes, just take the year-end statement plus the expenses that you paid outside of the management company to the accountant. If you are planning on having lots of properties you manage yourself, you will want to set them up in QuickBooks or look into landlord-oriented accounting software. Buildium has been mentioned elsewhere in this forum.
Umbrella insurance is useful. Tenants do sue. Start by calling the carrier you use for your own house and price rental and umbrella insurance.
If you buy a property listed on the MLS, you will probably want an agent to represent your interest. If you buy direct from a seller, you will represent yourself. As you are an inexperienced buyer, I recommend you get involved with your local real estate investors association and that you talk to agents that work with investors. You need to understand the process before you write any checks.
After you have figured out what kind of investment property you want to buy and what you are willing to spend, then start talking to lenders. If you use an agent, get referrals. The REIA folks may have lenders they like as well.
Read all the practical land lording books in the library. If the title says something about how to make 10 million dollars in one year with none of your own money, leave it on the shelf.